Q how accurate is the inbody compared to dexa. A the inbody is considered to be approx 98 accurate when compared against dexa. The inbody uses patented technology that relies on direct measurements and can perform segmental limbs and trunk measurements. Why an understanding of the inbody scanner will help you understand fluctuations in results. It uses a multihertz signal and a 4 compartment model. That being said there are inherent inaccuracies in any bia measuring device.
Here at w10 personal training gym we use the inbody machine as a way to measure body composition in order for clients to track their progress namely through muscle mass and body fat. However inbody technology addresses these concerns with its technological features and provides great precision and accuracy for total body and regional measurements. The inbody is probably the best of the bioimpedance machines. And does not rely on statistical data to determine muscularity of fat percentage. Total body water all the water in the body and is approx 60 of total weight. Accuracy through multi frequency measurement the inbodys multi frequency measurement method accurately measures intracellular water and extracellular body water by using multiple broadband frequencies in the range of 1khz 1000khz.
Inbody 270 gives a value for the various body compartments which equals the weight of each compartment when added together they equal the persons weight. The ability of the current to pass through cell membranes varies according to its frequency. James krieger at his old weightology web page did a review of all body fat methods and pointed out some of the flaws. The values can also be compared with the normal values. Total body water tbw inbody 270 measures tbw. It uses multiple frequencies of current to provide more accurate measurements.
While it is one of the more accurate body scanners on the market its findings shouldnt be taken as gospel. Q how high is the reproducibility of the inbody.